click to show more information

click to hide/show information About your Search

20121112
20121120
Search Results 0 to 0 of about 1
, it's an earth-moving problem, and we already have a well-developed technology in earth moving. now, in southern california and in many other areas as well, there are seasonal fluctuations in the lake level. typically, lake levels are low in the summer, but whatever season they're low, earth-moving equipment can come in and excavate these sands from the dry foreshore area. the foreshore deltas in these reservoirs contain most of the beach-size sand, and these will be high and dry when lake levels are low. so they can be collected with standard earth-moving equipment and trucked directly to the beach or reintroduced to the stream beds downstream. if there is technology and engineering available for transporting sand around dams, why isn't this being done? one reason may be that many scientists originally rejected the idea that dams actually contribute to erosion. but that is no longer the case. the problem currently seems to be that the value of sand as a coastal resource may still not be fully recognized. a lot of this sand is already excavated by sand and gravel companies for const
Search Results 0 to 0 of about 1